LM2596-5.0FW05ARHQ from GR, in a TO-263-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VIN	power_in	Positive input supply for the IC switching regulator. Operating range 4.5 V to 40 V (45 V absolute maximum). A suitable input bypass capacitor (e.g. 470 μF, 50 V) must be present at this pin to minimize voltage transients and supply the switching currents required by the regulator.
2	Output	output	Internal power switch output (emitter of the 3 A internal NPN switch). The voltage at this pin switches between approximately (+VIN − VSAT, VSAT ≈ 1.5 V at 3 A) and approximately −0.5 V with a duty cycle of VOUT/VIN. Connect to the catch diode and inductor of the buck output stage; keep the PCB copper area on this node small to minimize EMI coupling.
3	GND	power_in	Circuit ground return for the IC. On the TO-263 package the metal tab is internally connected to GND and serves as the primary thermal path to the PCB copper plane.
4	Feedback	input	Senses the regulated output voltage to complete the internal feedback loop. On the fixed 5 V version this pin is tied directly to the regulated 5 V output through the application circuit (internal divider sets 5 V ±4% over line/load). Absolute maximum feedback pin voltage is −0.3 V to 25 V.
5	~{ON}/OFF	input	Active-low TTL-compatible shutdown control. Pulling this pin below ~1 V (VIH threshold typ 1.3 V) turns the regulator on; pulling it above ~1.3 V (up to 25 V max) shuts the regulator down, dropping total input supply current to ~80 μA standby. Input current is ~10 μA at 2.5 V. If shutdown is not used, tie to GND or leave open (regulator will be ON).

Key specifications

Parameter	Value
Manufacturer	GR
Package	TO-263-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

LM2596-5.0FW05ARHQ
LM2596-5.0FW05ARHQDW05ATEQ

CAD (KiCad official)

Symbol: LM2596-5.0FW05ARHQ
Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
3D model: TO-263-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm2596-5-0fw05arhq.step`	180 KB	You want the bare part, or you mark your own boards.
`lm2596-5-0fw05arhq-etched.step`	2.9 MB	You want the part with `LM2596-5.0FW05ARHQ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 747 faces against 135 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: GR datasheet (9 pp, sha256 17c54a9eaf1cc15c, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF